DDA-4010
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Revision 01
Likewise, if the primary input source was to change its data rate to not match what the data
rate was set for, provided the secondary was at the correct rate, Automatic Changeover
would take place and the primary INPUT LED and both its corresponding data rate LEDs
would flash. This gives an indication of which input was actually set up as the primary input.
In this example ‘IN B’ would actually represent the primary input and ‘IN A’ would take
control with B’s data rate being set up for the HD rate, but actually being fed with an SD
data rate.
If both the primary and secondary input data rates do not match the set data rate, both the
primary and secondary INPUT LEDs and their corresponding data rate LEDs will flash. Being
set up as a single 1 In, 8 Out DA, the both data rate LEDs of the primary input will flash. This
shows which input has been set up as the primary input.
In this example the primary input is ‘IN A’ and its corresponding data rate is at the 3G rate.
The secondary input is ‘IN B’ and its corresponding data rate is at the SD rate. The set data
rate is obviously set for HD-SDI only as neither INPUT A (3G-SDI) nor INPUT B (SD-SDI) take
control.
Non-Reclocking Mode:
The rate set only applies to the reclocking mode. In non-reclocking mode the reclocker is bypassed allowing other
data rates to pass through. Whilst in the non-reclocking mode, if an input signal is present, the corresponding front
panel INPUT LED will illuminate, but the 3G, HD and SD LEDs will not except in the case where the input data rate
actually corresponds to a 3G, HD or SD rate. Likewise, in the reclocking mode, if an input is not at one of the
standard 3G, HD or SD rates the INPUT LED will flash and none of the 3G, HD or SD LEDs will illuminate or flash.
Front Panel Monitor Outputs:
With the DDA-4010 set up as a Single 1 In, 8 Out Distribution Amplifier with Automatic
Changeover disabled, the ‘CH.A’ and ‘CH.B’ BNC connectors on the front panel both
monitor the primary input.
With Automatic Changeover enabled, the ‘CH.A’ BNC connector monitors the signal
connected to INPUT A and the ‘CH.B’ BNC connector monitors the signal connected to
INPUT B.
Relay Bypass Option:
With the DDA-4010 fitted with the optional ZDA-4010RL relay bypass rear assembly, on loss of power or removal of
the card from the frame, the INPUT A signal is automatically routed via a relay to the output ‘OUT 1A’ port, as is
the INPUT B signal to the output ‘OUT 1B’ port. Thus if the DDA-4010 is being run in the single 1 In, 8 Out mode, if
anything is connected to the secondary input port, whether the Automatic Changeover mode is enabled or not,
the secondary input is also routed to one of the outputs. Caution should therefore be observed when connecting
to the secondary input to connect the correct signal if using the Automatic Changeover mode, or not connecting a
signal to the secondary input at all with the Automatic Changeover disabled, when using the relay bypass rear
assembly.
A B
INPUT
SD
HD
3G
CH.A
CH.B
A B
INPUT
SD
HD
3G
